CA2457272A1 - A projector with enhanced security camcorder defeat - Google Patents

A projector with enhanced security camcorder defeat Download PDF

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Publication number
CA2457272A1
CA2457272A1 CA002457272A CA2457272A CA2457272A1 CA 2457272 A1 CA2457272 A1 CA 2457272A1 CA 002457272 A CA002457272 A CA 002457272A CA 2457272 A CA2457272 A CA 2457272A CA 2457272 A1 CA2457272 A1 CA 2457272A1
Authority
CA
Canada
Prior art keywords
projector
enhanced security
light source
optics
modulation element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002457272A
Other languages
French (fr)
Other versions
CA2457272C (en
Inventor
David J. Nelson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of CA2457272A1 publication Critical patent/CA2457272A1/en
Application granted granted Critical
Publication of CA2457272C publication Critical patent/CA2457272C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91314—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91335—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a watermark
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91342—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being an authentication signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91371—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video color burst signal being modified
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91392—Television signal processing therefor for scrambling ; for copy protection using means for preventing making copies of projected video images
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Abstract

A projector (10) with enhanced security camcorder defeat including a copy protection illumination system (1) for illuminating a spatial light modulator (30) comprises: a polychromatic light source (20); uniformizing optics (22) for homogenizing light from the polychromatic light source to provide a uniform illumination field; relay optics; dichroic optics; an interference modulation element (5) located at a plane in an optical path located between the polychromatic light source and the spatial light modulator; and a detection means for determining the absence of the interference modulation element.
CA002457272A 2003-03-27 2004-02-11 A projector with enhanced security camcorder defeat Expired - Fee Related CA2457272C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/401,208 2003-03-27
US10/401,208 US7221759B2 (en) 2003-03-27 2003-03-27 Projector with enhanced security camcorder defeat

Publications (2)

Publication Number Publication Date
CA2457272A1 true CA2457272A1 (en) 2004-09-27
CA2457272C CA2457272C (en) 2007-09-18

Family

ID=32825007

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002457272A Expired - Fee Related CA2457272C (en) 2003-03-27 2004-02-11 A projector with enhanced security camcorder defeat

Country Status (5)

Country Link
US (1) US7221759B2 (en)
EP (1) EP1463310B1 (en)
JP (1) JP4295131B2 (en)
CN (1) CN100426128C (en)
CA (1) CA2457272C (en)

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Also Published As

Publication number Publication date
EP1463310A1 (en) 2004-09-29
EP1463310B1 (en) 2012-04-18
JP2004295098A (en) 2004-10-21
CA2457272C (en) 2007-09-18
JP4295131B2 (en) 2009-07-15
US7221759B2 (en) 2007-05-22
EP1463310A8 (en) 2005-06-15
CN100426128C (en) 2008-10-15
US20040190716A1 (en) 2004-09-30
CN1542539A (en) 2004-11-03

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Legal Events

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EEER Examination request
MKLA Lapsed

Effective date: 20140211